This paper introduces the design and development of intelligent ultrasonic ＂pig＂ used for seabed pipeline inspection. The data acquisition system （DAS） and the signal processing method are presented. The DAS was d...This paper introduces the design and development of intelligent ultrasonic ＂pig＂ used for seabed pipeline inspection. The data acquisition system （DAS） and the signal processing method are presented. The DAS was designed using a muhi-DSP based structure. The signal processing method adopted a well-enhanced split-spectrum processing （SSP） based on weighting algorithm according to statistical times, which was the statistical distribution of the discrete signals selected by the minimization algorithm. Furthermore, the data compressing method was discussed. It assures the mass data to be processed and compressed in real-time. The effectiveness of the method was proved by laboratory experiments. The research provides an excellent base for further development of the ultrasonic pig.展开更多
As for unmanned aircraft, the knowledge of the aircraft performance is directly related with the navigation, guidance, and control system programming. Therefore, the measured data in each phase of the flight must be s...As for unmanned aircraft, the knowledge of the aircraft performance is directly related with the navigation, guidance, and control system programming. Therefore, the measured data in each phase of the flight must be sufficiently precise to obtain a good characterization of aircraft.This article proposes new methods of sending information to ground, which make it possible to know the aircraft behavior accurately, and for this purpose, four contributions have been made for ALO(Avión Ligero de Observación, Spanish acronym for Light Observation Aircraft). Currently, the characterization is based on data obtained at ten samples per second, insufficient to acquire detailed knowledge of what happened during the whole flight of an aircraft. As a result of these contributions, many more samples per second of accelerations and angular velocities are obtained at the most critical moments of the flight, such as takeoff or landing. Among the improvements included are data compression techniques, providing references to locate the measured data in time and identifying labels of each parameter.展开更多
This peper proposes a new type of dynamic ECG (Holier) monitoring andrecording system based on technology or computer controlling and high storage capacitydynamic RAM (DRAM). The system realizes the monitoring and rec...This peper proposes a new type of dynamic ECG (Holier) monitoring andrecording system based on technology or computer controlling and high storage capacitydynamic RAM (DRAM). The system realizes the monitoring and recording ECG signalscontinuously up to 24 hours with the double error criterion ECG data compression algorithm or time error and amplitude error[1], adaptive algorithm for detecting andanalysing the oRS complexes[2] and the technology of high storage capacity DRAM. Itsadvantages are high storage Capacity (4MB), low power dissipation (less titan 30mA).展开更多
基金Supported by the High Technology Research and Development Program of China (Grant No2001AA602021)
文摘This paper introduces the design and development of intelligent ultrasonic ＂pig＂ used for seabed pipeline inspection. The data acquisition system （DAS） and the signal processing method are presented. The DAS was designed using a muhi-DSP based structure. The signal processing method adopted a well-enhanced split-spectrum processing （SSP） based on weighting algorithm according to statistical times, which was the statistical distribution of the discrete signals selected by the minimization algorithm. Furthermore, the data compressing method was discussed. It assures the mass data to be processed and compressed in real-time. The effectiveness of the method was proved by laboratory experiments. The research provides an excellent base for further development of the ultrasonic pig.
文摘As for unmanned aircraft, the knowledge of the aircraft performance is directly related with the navigation, guidance, and control system programming. Therefore, the measured data in each phase of the flight must be sufficiently precise to obtain a good characterization of aircraft.This article proposes new methods of sending information to ground, which make it possible to know the aircraft behavior accurately, and for this purpose, four contributions have been made for ALO(Avión Ligero de Observación, Spanish acronym for Light Observation Aircraft). Currently, the characterization is based on data obtained at ten samples per second, insufficient to acquire detailed knowledge of what happened during the whole flight of an aircraft. As a result of these contributions, many more samples per second of accelerations and angular velocities are obtained at the most critical moments of the flight, such as takeoff or landing. Among the improvements included are data compression techniques, providing references to locate the measured data in time and identifying labels of each parameter.
文摘This peper proposes a new type of dynamic ECG (Holier) monitoring andrecording system based on technology or computer controlling and high storage capacitydynamic RAM (DRAM). The system realizes the monitoring and recording ECG signalscontinuously up to 24 hours with the double error criterion ECG data compression algorithm or time error and amplitude error[1], adaptive algorithm for detecting andanalysing the oRS complexes[2] and the technology of high storage capacity DRAM. Itsadvantages are high storage Capacity (4MB), low power dissipation (less titan 30mA).
